期刊论文

中文

工程力学

1000-4750

2024

41

3

91-105

10.6052/j.issn.1000-4750.2022.04.0303

52078059:国家自然科学基金 51808055:国家自然科学基金 202016:湖南交通科技项目

本校为第一机构

某大桥次边跨及中跨主梁为钢-UHPC组合梁,钢-UHPC组合梁的桥面板首次采用一种通过PBL剪力键将 8 mm平钢板与 15 cm的UHPC层连接起来的新型组合桥面体系.为了探究该桥新型钢-UHPC组合桥面板抗负弯矩性能与安全性,完成了 2块足尺模型的静力性能试验,进行了桥梁整体受力和桥面板局部受力计算,以及桥面板抗负弯矩极限承载力构成分析.结果表明:UHPC名义开裂强度达 8.90 MPa以上,其值远大于实桥荷载作用下UHPC层上缘的纵桥向最大拉应力,组合桥面板负弯矩抗裂性能良好,能满足工程需求;组合桥面板抗负弯承载力的计算,UHPC受拉本构宜采用三折线模型,抗负弯承载力简化计算的UHPC受拉区等效均布应力折减系数...

The main girder of the secondary span and middle span of a bridge is steel-UHPC composite beam,and the bridge deck of which adopts a new type of composite bridge deck system for the first time with 8 mm flat steel plate being connected with 15 cm UHPC layer by PBL shear key.In order to explore the performance and safety of negative bending moment resistance of the new steel-UHPC composite bridge deck of the bridge,the static performance tests of two full-scale models were completed,and the overall force of the bridge and the local force of the bridge deck were calculated.The composition analys...